Coordinated stopping of take-up and process machines

ABSTRACT

Winding machines that spool wire delivered from a processing machine, such as a wire drawing apparatus, having a speed control that passes a loop of wire around a dancer roll that actuates the control. This invention coordinates the stopping of the processing machine and the winding machine by providing a brake to the rotation of the winding machine spool. This brake applies a negative torque that is grossly set to stop the rotation of the winding machine at a decrease rate which is greater than the decrease rate of the processing machine. A positive torque of the winding machine drive is applied during the brake actuation and continues to supply a positive torque under the control of the dancer roll. The stopping rate of the winding machine is thus coordinated to the stopping time of the processing machine.

limited States Patent [191 Bravin [451 Aug, 27, 1974 2,708,024 5/1955Bryden 72/279 [75] Inventor: Ben Bravin, New York, NY. 'yExaminer-Charles Lanham Assistant ExaminerM. J. Keenan [73] Assrgnee:Cook Maclunery Company, Dlvlslo Attorney, Agent, or FirmRalph R. Robertsof Wire Technology & Machinery Company, Hackensack, NJ. [22] Filed: July13, 1973 [57] ABSTRACT Winding machines that spool wire delivered from a[2!] Appl' 378989 processing machine, such as a wire drawing apparatus,avin ?..Pee 1 ..e2nr9! t 1at,passes Heep of i [52] US. Cl 72/19, 72/279,72/288 around a dancer roll that actuates the controlf'lhis in [51 Int.Cl. B2lc 1/ 12 vention coordinates the stopping of the processing ma-[58] Field of Search 72/279, 288, 289, 443, chine and the windingmachine by providing a brake 72/10, 17, 19, 26, 30; 242/78, 80, 156 tothe rotation of the winding machine spool. This brake applies a negativetorque that is grossly set to [5 6] References Cited stop the rotationof the winding machine at a decrease UNITED STATES PATENTS rate which isgreater than the decrease rate of the pro- 1 354 336 9/1920 Pierson72/289 cessing machine. A positive torque of the winding mal:920 2078/1933 Mcllvriedxx: I 1: 72/289 chin? drive is 39PM dun-g thebiakgaquafion 2.0471374 7/1936 Larsen 72/289 continues to Supply aPositive terqueunder the 2,067,973 H1937 Mcllvried 72/289 trel 0f thedaneer rell- The Stepping rate of the Wind- 2,068,836 l/ 1937 Zarafu r.72/279 ing machine is thus coordinated to the stopping time 2,266,86112/1941 Haase 72/289 of the processing machine. 2,331,798 10/1943 Orr72/289 2,417,780 3/1947 Parvin 72/289 12 Claims, 3 Drawing FiguresAUTOMTIC 34 36 ANN 3 WINDING 2O 22 EALER MACHINE I et I' 48 O /26 \k,JIO I PROCE$S 30 84 MACHINE 7 6 1 POSITIVE TORQUE CONTROL FOR MOTORCOORDINATED STOPPING OF TAKE-UP AND PROCESS MACHINES BACKGROUND ANDSUMMARY OF THE INVENTION Where processing machines supply wire towinding machines (spoolers) that wrap the wire on a spool, there is aproblem in synchronizing the stopping of the machines. Although theinvention will be described in connection with wire processingapparatus, such as a wire drawing machine, it will be understood that itcan be used also with any processing machine that turns out long lengthsof material that have to be wound on spools.

It is conventional practice to have a dancer roller between a processingmachine and a spooler. This dancer roller produces a loop in the wireand the length of the loop increases or decreases in accordance withvariations in the relative speeds of the processing machine and thespooler. The speed of the spooler is controled in response to change inposition of the dancer roll so as to increase the spooler speed if theloop gets longer and to decrease the spooler speed when the loop getsshorter. The control varies the power supply to the spooler motor.

It is also conventional to cause power to the processing machine and thewinding machine to be cut off to stop the machines, and results in thecoordinations of speed by the position of the dancer roller to be lostbecause there is no longer any positive torque supplied by the windingmachine motor under the control of the position of the dancer roll. Thecircuit of the winding machine motor is open and the dancer roll controlis no longer operative. A mechanical brake is applied which has beenpreset or is manually adjusted to generally slow down the windingmachine in accordance with the deceleration of the processing machine.

This brake adjustment is critical and because of variations of differentparameters (brake power, temperature, inertia of reel, amount of wire onthe reel, etc.) coordinated braking is seldom achieved. When braking isexcessive, the reel stops too soon and the wire falls off the pulleys,when braking is insufficient, the reel keeps running while the processmachine is fully stopped which breaks the wire and necessitates a newstringing up operation. Also, where power to both the processing machineand the spooler is discontinued there is no possibility of applyingcertain additional sensitive tandem processing to the wire such asannealing during the deceleration whereas in the present inventionprocessing continues thereby reducing scrap otherwise generated duringthe deceleration.

Controls are known and available for synchronizing the stopping ofprocessing and winding machines so as to solve this problem, but suchcontrols are complicated and expensive. This invention provides animproved control for coordinated stopping and the principle employedoften makes it possible to use conventional apparatus with a mere changein the wiring of the apparatus.

The invention brings the processing machine and the winding machine to asubstantial stop without shutting off the power to the winding machine.The comparatively small positive torque applied to the winding machineby the winding machine motor, and the control of this torque by theposition of the dancer roller is continued while the processing machineand the winding machine are being stopped. The winding machine brake isset to apply a large negative torque (i.e., braking effect) which wouldstop the winding machine before the processing machine stopped were itnot for the continued positive torque from the winding machine motor.

As the processing machine stops, which may be because its power is cutoff or by a motor deceleration control, at whatever rate results fromconditions existing at the time, the winding machine operating inaccordance with this invention decelerates at the same rate because thedancer roll senses changes in the amount of material accumulated in theloop and controls the torque of the winding machine motor to bring theloop back to normal and the winding machine to rotate in coordinationwith the speed of output of the processing machine. I

Just before the processing andwinding machines come to a full stop, thepower to the winding machine motor is shut off so that power is nolonger applied to the motor of the winding machine when it and thewinding machine spool reach a stalled condition. At this stage anyremaining difference in the time required for the processing machine andthe winding machine to come to a complete stop is accommodated withoutharm to the wire by the increase or decrease in the slack in the loop ofwire at the dancer roll even though the dancer is no longer controlingthe speed of the winding machine motor.

This invention will be described with the winding machine motor torquecontrolled by changes in'position of the dancer roll; but it can beapplied to apparatus where the control of the winding machine torque isobtained by comparing the wire speed to the processing machine speed bymeans of tachometer generator instead of by the position of the dancerroll, and where the dancer roll is used solely for accumulation of theloop of wire or other material supplied by the processing machine, orany other satisfactory control.

Other objects, features and advantages of the invention will appear orbe pointed out as the description proceeds.

BRIEF DESCRIPTION OF DRAWING In the drawing, forming a part hereof, inwhich like reference characters indicate corresponding parts in all theviews:

FIG. 1 is a diagrammatic view showing a processing machine and a windingmachine with the stopping of the machines controlled by apparatus ofthis invention;

FIG. 2 is a diagrammatic top plan view of the spool of the windingmachine shown in FIG. 1 together with the winding machine motor and thebrake for stopping the winding machine; and

FIG. 3 is a graph showing the acceleration, full speed operation anddeceleration of the winding machine and processing machine, and showingalso the corresponding application on a time scale of the power to theprocessing machine, the winding machine and thewinding machines brake.

DESCRIPTION OF PREFERRED EMBODIMENT FIG. 1 shows a processing machinesuch as a wire drawing machine 10 having a driving motor 12 whichtransmits power through motion transmitting connections 14 to a capstan16 which pulls the wire through a die or series of dies 18. The wire,indicated by the reference character 20 travels from the processingmachine across a guide pulley 22 and such other guide pulleys as arenecessary, to a winding machine 26 in which the wire is wrapped on aspool 28 driven by a motor 30 through motion transmitting connections32, such as a chain and sprocket drive.

On its way to the winding machine 26, the wire 20 passes over guiderolls 34 and 36 between which it is deflected downwardly to form a loopof wire, indicated by the reference character 38. This loop of wirepasses around a dancer roll which reverses the direction of run of theloop 38. If the winding machine 26 winds wire on the spool 28 fasterthan wire is supplied from the processing machine 10, then the loop 38decreases in length and the dancer roll 40 is moved upward. Conversely,if the winding machine 26 does not wind wire on the spool 28 as fast asthe wire is delivered from the processing machine 10, then the extrawire accumulates in the loop 38 and the loop becomes longer so that thedancer roll 40 moves downward.

The dancer roll 40 has a spring 42 which applies on it a force in adirection to increase the length of the loop 38. The up and downmovement of the dancer roll 40 is indicated by the arrows 44 and 46. Aposition feed back means such as a potentiometer 48 is connected withthe dancer roller 40 to supply information signals through conductors 50to control apparatus 52 which regulates the speed of the winding machinemotor 30 so as to increase the motor speed when the loop 38 becomeslonger and to decrease the speed of the motor 30 when the loop 38becomes shorter. The motor 30 applies a positive torque to the spool 28;that is, a torque which causes the spool to turn in a direction to windthe wire 20 on the spool.

In the apparatus illustrated in FIG. 1 there is an automatic annealer 54located between the processing machine 10 and the winding machine 26.Automatic annealers are well known in the wire drawing art and the heatsupplied by the annealer to the wire is regulated automatically inaccordance with the speed of the wire when the apparatus is operatingnormally; that is, with the speed of the wire spool 28 and motor 30regulated by the position of the dancer roll 40. The dancer roll 40 isalso conventional equipment for wire drawing apparatus and many otherprocessing apparatus for work of long length. No further description,therefore, of the automatic annealer or the dancer roll 40 is necessaryfor a complete understanding of this invention.

FIG. 1 shows a tachometer generator 56 which is connected with the guide36 mechanically so as to run at the same speed as the guide roll 36 orat a speed proportional to that of the guide roll 36. The circuit of thetachometer generator 56 is connected by a conductor cable 58 to thecontrol 52 for the motor 30. In the operation of the control 52, theposition of the dancer roll 40 controls the torque of the motor 30 whenthe apparatus is operating at full operating speed and when theapparatus is stopping. The output of the tachometer generator 56 is afeedback signal which indicates to the control 52 the actual speed atwhich the wire 20 is being wrapped on the spool 28. When this speedreaches a predetermined low value, the control 52 opens the power supplycircuit to the motor 30 so that the motor 30 is no longer connected withthe electric power supply when the motor reaches a stalled condition. Inthe preferred embodiment of the invention, the control 52 shuts offpower to the motor 30 for the final five percent of the decelerationtime as will be explained more fully in connection with FIG. 3.

FIG. 2 shows the spool 28 secured to a shaft or axle 60 which rotates inbearings 62 and which is connected by the motion transmitting connection32 to the motor 30. There is a brake drum 66 secured to the shaft 60 anda brake band 68, surrounding the brake drum 66, is moved into brakingengagement by a cylinder and piston when compressed air is suppliedtothe cylinder through a compressed air line 72. A conventional band brakecan be used as the brake 66-68 of this invention. Such brakes have aspring bias to provide and maintain a brake released position and forceis applied to the brake band to force the band into brake energizingcontact with the drum.

The force with which the brake band 68 is applied to the drum 66, andthe resulting negative torque applied to the shaft 60 on the spool 28depends upon the force exerted by the piston 70. This force can beadjusted by regulating the air pressure that operates the piston 70. InFIG. 2 compressed air is supplied to the piston 70 from a source 74through the line 72. A pressure regulator 76 is located in the air line72 with a gauge 78 indicating the pressure in this line. Regulatoradjusting handwheel or knob 80 is turned to increase or decrease thedownstream pressure in the line with this adjustment being sufficient toobtain a desired pressure which will positively cause the brake 66-68 tostop the winding machine spool 28 before the processing machine 10 comesto a stop after power to its motor 12 is controllably decreased or isshut off. In actual operation, however, the brake 66-68 does not stopthe winding machine spool before the processing machine is stopped as acontrolled amount of the power to the winding machine motor 30 ismaintained during the stopping period. The positive torque of thewinding machine motor 30 is regulated by the position of the dancer rolland this input diminishes the braking effect 'of the brake 6668 on thespool. The combined negative torque brake action and the positive torqueof the motor causing the winding machine and processing machine to astop at substantially the same time. The control 52 feeds the desiredand required current to motor 30 in response to signals received fromthe dancer roll 40.

An alternate coordinated stopping system with high usefulness forapparatus with motors that have variable speed control means on both theprocess and winding machines is to operate the speed control regulatingthe speed of the processing machine motor so as to obtain a controleddeceleration of the processing machine instead of having it coast to astop. A controlled motor deceleration substantially eliminates theproblems arising from the variations in the time of stopping which occurwith the changes in the processing factors of drawing wire producingdifferent loads. By proper control, linear deceleration of theprocessing machine can be obtained and this may be desirable for somein-line auxiliary processing apparatus such as the annealer 54, or otherauxiliary apparatus.

In FIGS. 1 and 2, the motor 12 of the processing machine is shown asconnected across conductors 84 and 86 which comprise a power line. Thepower supplied to the motor 28 can be made or broken by a switch 88located in this power line. Beyond the switch 88, the

power line comprising the conductors 84 and 86 leads to a solenoidconnected to a three way valve 92 in the compressed air supply line 72.

When the solenoid 90 is energized, the valve 92 is moved into theposition shown in FIG. 2 where it connects the cylinder 70 with anexhaust outlet 94 of the three way valve 92. In this position thepneumatic cylinder is open to atmosphere and the spring return causesthe piston to be at its right end whereat the brake is fully disengaged.When the solenoid 90 is deenergized, a spring 96 pulls the valve 94 intoa position which connects the compressed air source 74 with the cylinder70 through the regulator 76 to supply the desired force to operate thebrake 66-68. Thus the valve 92 operates to apply the brake 66-68whenever the power to the processing machine motor 12 is shut off; andoperates to release the brake whenever the power to the processingmachine motor 12 is again turned on.

FIG. 3 illustrates the operation of the invention by means of fourgraphs. In the uppermost graph, the apparatus is started at a time T 1and the acceleration of both the processing machine and the windingmachine is represented by the ascending graph line 100.

At time T 2, the apparatus is up to full speed and continues to operateat full speed as indicated by the horizontal graph line 102.

When the apparatus is started, the main machine drive; that is, thedrive of the processing machine is turned on at the time T l asindicated by the second graph of FIG. 3 and as represented by thevertical line 104a. The spool drive is also turned on at the same timeas represented by the vertical graph line l04b in the third graph ofFIG. 3; and the spooler brake is released; that is, is moved to its offposition as indicated by the vertical line 1040 in the bottom chart ofFIG. 3.

All during the acceleration period and the full speed running period,the main machine drive and the spool drive are on, as indicated by thehorizontal lines 105a and l05b in the second and third charts of FIG. 3and the brake remains in its off position as indicated by the horizontalline 105s in the bottom chart.

When the apparatus is to be stopped at the time T 3, the power to themain machine drive is shut off by opening the switch 88 of FIG. 1 andthis is represented by the vertical line 106a in the second chart ofFIG. 3. The spooler drive motor remains energized by a variable sourceof current as determined by control 52 which is indicated by thecontinuation of the line l05b in the third chart beyond the time T 3.Opening of the circuit of the main machine drive motor 18 (FIG. 1)causes the spooler drive brake to be applied at the time T 3 since itreleases the solenoid 90 of FIG. 2 so that the spring 96 moves the valve92 into position where pressurized air is fed to cylinder 70 to causethe cylinder to energize the brake 66-68 as previously explained. Thisapplication of the brake is represented in the bottom chart by thevertical line 106C.

The apparatus decelerates as represented by the downwardly sloping line108 in the top chart of FIG. 3 for a time extending from T 3 to T 5. Thetime T 5 is beyond an intermediate time T 4 on the graph by an amountequal to approximately 5 percent of the deceleration time.

The main machine drive remains off during the entire deceleration timeas represented by the horizontal line 109a in the second chart; and thespooler drive is shut off at the time T 4 as represented by the verticalline 110 in the third chart. The shutting off of the drive to thespooler motor at the time T 4 has been explained in connection with theoperation of the tachometer generator 56, though it will be evidentother types of controls responsive to the motor speed or wire speed canbe used.

As above noted the process machine may be precisely decelerated with theuse of a motor speed control for motor 12. Where this manner of machineoperation is provided switch 88, of course, is deleted and the controlcircuit which begins the deceleration cycle of the process machine alsodeenergizes the solenoid 90. It is, of course, to be noted that solenoidmay be arranged to provide an opposite movement and be actuated only tomove valve 92 to the brake energizing position. The arrangement andactuation of the solenoid is merely a matter of selection. For thatmatter other well known valve actions may be provided. Also as abovenoted, the dancer roll is not essential to the invention since thecontrol 52 may be operated completely in response to the signals fromthe tachometer generator 56. During the deceleration control of thespooler drive, whether a dancer or a tachometer generator or both areused, the brake 66-68 is grossly set to stop the spooler at a rate whichis faster than the deceleration rate of the process machine whether thisdeceleration is by a power-off or by a decreasing speed of the motor 12.The positive drive control system 52 is only programmed to keep wire 20moving to spool 28 at a selected rate thereby only a selected drivetorque signal and means is required. When brake 66-68 is applied thespooler motor 30 adds positive torque to the torque in the alreadyrotating spool 28, these positive added torques exactly balancing thenegative torque of the brake.

It is to be further noted that the coordinated stopping means of thisinvention permits the processing machine to be operated as a wiredrawing machine with no slip of the wire at capstan 16. This permits theautomatic annealer 54 to be precisely controlled by the capstanrotational speed rather than the less accurate downstream tachometergenerator 56.

The above-described spooler deceleration control provides an inexpensivebut highly accurate coordinated stopping means and uses only a simplemotor drive and brake rather than an expensive positive motor drive andspeed control having reverse loading capabilities.

The brake remains applied during the entire deceleration time asindicated by the horizontal line 1096' and ordinarily remains appliedcontinuously until the apparatus is started up again.

The preferred embodiment of the invention has been illustrated anddescribed, but changes and modifications can be made, and some featurescan be used in different combinations without departing from theinvention as defined in the claims.

What is claimed is:

1. In a wire drawing and similar system in which the strand output of aprocessing machine is wound on a reel in a winding machine, there isprovided apparatus for the coordinated deceleration and stopping of thewinding machine in accordance with the deceleration and stopping of theprocessing machine, this coordinated deceleration of the processing andwinding machines preventing undue strain and breaking of the strandextending therebetween, said coordinating deceleration apparatusincluding: (a) a processing machine having a positive torque drivedisposed to bring said machine from a stopped condition to a normalrunning rate of speed; (b) means to discontinue the running speedoperation of this processing machine and to decelerate at a selectedrate to bring the processing machine to a stopped condition; a windingmachine for wrapping the strand output of the processing machine on arotating reel associated therewith; (d) positive torque means to bringthe reel of the winding machine from a stopped condition to a rotationalrate sufficient to wind the strand output of the processing machine at adetermined rate of production; (e) means for sensing the rate at whichthe strand material comes from the processing machine and in responsethereto to vary the positive torque means of the winding machine and therotation of the associated winding reel, and (f) means for deceleratingand stopping the reel of the winding machine at a rate which is insynchronism with the selected rate of deceleration of the processingmachine, said decelerating and stopping means including a brake inassociation with the winding machine, this brake being energized whenand as the deceleration of the processing machine is begun, said brakeincluding means for providing a negative torque sufficient to stop thereel of the winding machine in a lesser time than the time required todecelerate and stop the processing machine and including means forcontinuing to provide a positive torque input to the winding machineduring the time the brake is applied, said torque input sufficient forthe winding machine to wind at the same rate as the output of theprocessing machine, this positive torque being controlled by the meansfor sensing the rate at which the strand material is delivered from theprocessing machine.

2. The apparatus as described in claim 1 characterized by the processingmachine and the winding machine each having its own motor and furtherincluding switch means for shutting off power to the processing machineto cause deceleration and the stopping thereof, the energizing of thebrake including an electric circuit that is operative when the power tothe processing machine motor is shut off.

3. The apparatus described in claim 1 characterized by motors fordriving the processing machine and the winding machine and furtherincluding means for shut ting off power to the processing machine whilepower continues to be supplied to the winding machine motor and thebrake being operative to bring the winding machine to a substantial stopwhile power is still supplied to the winding machine motor and at thesame time to said means for sensing the delivery rate of the strandmaterial that varies the positive torque means of the winding machine.

4. The apparatus described in claim 3 characterized by means responsiveto the winding machine speed for shutting off the power to the windingmachine motor when the winding machine motor comes to a substantial stopbut is not yet completely stalled.

5. The apparatus described in claim 1 wherein the means for sensing thedelivery rate of the strand material includes a dancer roller thatcontacts with a loop of the strand material between the processingmachine and the winding machine, the dancer roller being movable intodifferent positions in response to the changes in the length of the loopresulting from variations in the relative speeds of the processingmachine and the winding machine, and a control means responsive to saidsensing means and to vary accordingly the positive torque in response tochanges of position of the dancer roll.

6. The apparatus described in claim 5 which further includes atachometer generator which is driven by the material fed to the loop,and means responsive to the drop in output of the tachometer generatorfor shutting off power to the winding machine motor when the deliveryspeed of the wire drops to a slow speed such as two to five percent ofthe normal speed of the processing machine the excess material beingaccommodated without breaking by the available accumulation in thedancer roll system.

7. The apparatus described in claim 1 which further includes a dancerroll that contacts and forms a portion of a loop in the materialextending between the processing machine and the winding machine, thedancer roll being movable into different positions in response to thechanges in the length of the loop resulting from variations in therelative speed of the processing machine and the winding machine and inwhich the positive torque varies in response to a control input to anelectric operating mechanism, whose output is varied to provide a signalmeans generated in response to changes in position of the dancer roll.

8. The apparatus described in claim 1 characterized by detector meansthat sense differences in the relative speed of the processing machineoutput and the rate of winding of the winding machine, the control forthe positive torque being operative to vary the torque of the windingmachine motor in proportion to said differences as sensed by thedetector.

9. The apparatus described in claim 8 characterized by an actuator forthe brake, and means for adjusting the actuator to increase or decreasethe negative torque exerted by the brake on the winding machine motor soas to stop the winding machine in a time period less than that requiredfor the processing machine to decelerate and stop.

10. The apparatus described in claim 8 characterized by a tachometergenerator that is driven from the material advancing to the windingmachine and at a speed proportional to the rate of winding of thematerial by the winding machine, and an electric circuit operablyconnecting the tachometer generator with the control for the windingmachine for shutting off all power to the winding machine motor when thewinding machine speed drops below a predetermined minimum.

11. The apparatus described in claim 1 characterized by auxiliaryprocessing apparatus for annealing furnace located between theprocessing machine and the winding machine and through which materialprocessed in the processing machine passes on its way to the windingmachine.

12. The apparatus described in claim 11 characterized by the auxiliaryprocessing apparatus being an automatic annealing furnace.

1. In a wire drawing and similar system in which the strand output of aprocessing machine is wound on a reel in a winding machine, there isprovided apparatus for the coordinated deceleration and stopping of thewinding machine in accordance with the deceleration and stopping of theprocessing machine, this coordinated deceleration of the processing andwinding machines preventing undue strain and breaking of the strandextending therebetween, said coordinating deceleration apparatusincluding: (a) a processing machine having a positive torque drivedisposed to bring said machine from a stopped condition to a normalrunning rate of speed; (b) means to discontinue the running speedoperation of this processing machine and to decelerate at a selectedrate to bring the processing machine to a stopped condition; (c) awinding machine for wrapping the strand output of the processing machineon a rotating reel associated therewith; (d) positive torque means tobring the reel of the winding machine from a stopped condition to arotational rate sufficient to wind the strand output of the processingmachine at a determined rate of production; (e) means for sensing therate at which the strand material comes from the processing machine andin response thereto to vary the positive torque means of the windingmachine and the rotation of the associated winding reel, and (f) meansfor decelerating and stopping the reel of the winding machine at a ratewhich is in synchronism with the selected rate of deceleration of theprocessing machine, said decelerating and stopping means including abrake in association with the winding machine, this brake beingenergized when and as the deceleration of the processing machine isbegun, said brake including means for providing a negative torquesufficient to stop the reel of the winding machine in a lesser time thanthe time required to decelerate and stop the processing machine andincluding means for continuing to provide a positive torque input to thewinding machine during the time the brake is applied, said torque inputsufficient for the winding machine to wind at the same rate as theoutput of the processing machine, this positive torque being controlledby the means for sensing the rate at which the strand material isdelivered from the processing machine.
 2. The apparatus as described inclaim 1 characterized by the processing machine and the winding machineeach having its own motor and further including switch means forshutting off power to the processing machine to cause decelerAtion andthe stopping thereof, the energizing of the brake including an electriccircuit that is operative when the power to the processing machine motoris shut off.
 3. The apparatus described in claim 1 characterized bymotors for driving the processing machine and the winding machine andfurther including means for shutting off power to the processing machinewhile power continues to be supplied to the winding machine motor andthe brake being operative to bring the winding machine to a substantialstop while power is still supplied to the winding machine motor and atthe same time to said means for sensing the delivery rate of the strandmaterial that varies the positive torque means of the winding machine.4. The apparatus described in claim 3 characterized by means responsiveto the winding machine speed for shutting off the power to the windingmachine motor when the winding machine motor comes to a substantial stopbut is not yet completely stalled.
 5. The apparatus described in claim 1wherein the means for sensing the delivery rate of the strand materialincludes a dancer roller that contacts with a loop of the strandmaterial between the processing machine and the winding machine, thedancer roller being movable into different positions in response to thechanges in the length of the loop resulting from variations in therelative speeds of the processing machine and the winding machine, and acontrol means responsive to said sensing means and to vary accordinglythe positive torque in response to changes of position of the dancerroll.
 6. The apparatus described in claim 5 which further includes atachometer generator which is driven by the material fed to the loop,and means responsive to the drop in output of the tachometer generatorfor shutting off power to the winding machine motor when the deliveryspeed of the wire drops to a slow speed such as two to five percent ofthe normal speed of the processing machine the excess material beingaccommodated without breaking by the available accumulation in thedancer roll system.
 7. The apparatus described in claim 1 which furtherincludes a dancer roll that contacts and forms a portion of a loop inthe material extending between the processing machine and the windingmachine, the dancer roll being movable into different positions inresponse to the changes in the length of the loop resulting fromvariations in the relative speed of the processing machine and thewinding machine and in which the positive torque varies in response to acontrol input to an electric operating mechanism, whose output is variedto provide a signal means generated in response to changes in positionof the dancer roll.
 8. The apparatus described in claim 1 characterizedby detector means that sense differences in the relative speed of theprocessing machine output and the rate of winding of the windingmachine, the control for the positive torque being operative to vary thetorque of the winding machine motor in proportion to said differences assensed by the detector.
 9. The apparatus described in claim 8characterized by an actuator for the brake, and means for adjusting theactuator to increase or decrease the negative torque exerted by thebrake on the winding machine motor so as to stop the winding machine ina time period less than that required for the processing machine todecelerate and stop.
 10. The apparatus described in claim 8characterized by a tachometer generator that is driven from the materialadvancing to the winding machine and at a speed proportional to the rateof winding of the material by the winding machine, and an electriccircuit operably connecting the tachometer generator with the controlfor the winding machine for shutting off all power to the windingmachine motor when the winding machine speed drops below a predeterminedminimum.
 11. The apparatus described in claim 1 characterized byauxiliary processing apparatus for annealing furnace located between theprocessing machinE and the winding machine and through which materialprocessed in the processing machine passes on its way to the windingmachine.
 12. The apparatus described in claim 11 characterized by theauxiliary processing apparatus being an automatic annealing furnace.